<template>
    <div class="login_container">
        <el-row>
            <el-col :span="12" :xs="0"></el-col>
            <el-col :span="12" :xs="24">
                <!-- 登录的表单 -->
                <el-form class="login_form" :model="loginForm" ref="loginForms" :rules="rules">
                    <h1>hello</h1>
                    <h2>欢迎来到硅谷甑选</h2>
                    <el-form-item prop="username">
                        <el-input v-model="loginForm.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
                    </el-form-item>
                    <el-form-item prop="password">
                        <el-input type="password"
                        placeholder="请输入密码"
                        :prefix-icon="Lock" v-model="loginForm.password"
                            show-password></el-input>
                    </el-form-item>
                    <el-form-item>
                        <el-button :loading="loading" type="primary" class="login_btn" @click="login">登录</el-button>
                    </el-form-item>
                </el-form>

            </el-col>
        </el-row>
    </div>
</template>

<script setup lang="ts">
import { User, Lock } from '@element-plus/icons-vue';
import { ElNotification } from 'element-plus';

import { reactive, ref } from 'vue';
let loginForm = reactive({ username: '', password: '' });
import useUserStore from "@/store/modules/user";
const useUser = useUserStore();
import { useRouter,useRoute } from 'vue-router';

// 引入判断当前时间的函数
import { getTime } from "@/utils/time";
// 获取路由器实例
const $router = useRouter();
// 获取路由实例
const $route = useRoute();
// 定义变量控制按钮的加载效果
let loading = ref(false);

// 获取form表单实例
const loginForms = ref();

// 获取自定义表单校验规则函数  好处就是比较灵活，可以书写任意规则
const validatorUserName = (_rule:any,value: any, callback: any) => {
    //rule:即为校验规则对象
    //value:即为表单元素文本内容
    //函数:如果符合条件callBack放行通过即为
    //如果不符合条件callBack方法,注入错误提示信息
    if (value.length >= 5) {
        callback();
    } else {
        callback(new Error('账号长度至少五位'));
    }
}
const validatorPassword = (_rule:any,value: any, callback: any) => {
    if (value.length >= 6) {
        callback()
    } else {
        callback(new Error("密码长度不能小于6位"))
    }
}

// 定义表单的验证规则
const rules = {
    //规则对象属性:
    //required,代表这个字段务必要校验的
    //min:文本长度至少多少位
    //max:文本长度最多多少位
    //message:错误的提示信息
    //trigger:触发校验表单的时机 change->文本发生变化触发校验,blur:失去焦点的时候触发校验规则
    username: [
        // { required: true, message: '请输入用户名', trigger: 'blur' },
        // { required: true, min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'change' }
        { trigger: 'change', validator: validatorUserName }
        
    ],
    password: [
        // { required: true, message: '请输入密码', trigger: 'blur' },
        // { required: true, min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'change' }
        { trigger: 'change', validator: validatorPassword }
    ]
}


// 登录方法的回调
const login = async () => {

    // 表单的验证
    await loginForms.value.validate();

    // 按钮的加载效果
    loading.value = true;
    try {
        await useUser.userLogin(loginForm)
        // 路由跳转 判断是否携带参数
        let redirect:any = $route.query.redirect ;
        $router.push({path:redirect||'/'});
        ElNotification({
            type: 'success',
            message: "欢迎回来",
            title: `Hi,${getTime()}`
        })
    } catch (error) {
        //登录失败加载效果消息
        loading.value = false;
        //登录失败的提示信息
        ElNotification({
            type: 'error',
            message: (error as Error).message
        })
    }
}




</script>
<style lang="scss" scoped>
.login_container {
    width: 100%;
    height: 100vh;
    background: url("@/assets/images/background.jpg") no-repeat;
    background-size: cover;

    .login_form {
        position: relative;
        width: 80%;
        top: 30vh;
        background: url("@/assets/images/login_form.png") no-repeat;
        background-size: cover;
        padding: 40px;

        h1 {
            color: white;
            font-size: 40px
        }

        h2 {
            font-size: 20px;
            color: white;
            margin: 20px 0px;
        }

        .login_btn {
            width: 100%;
        }
    }


}
</style>